Building block



A portion of the disclosure of this patent, including appendices, may contain material which is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.

FIG. 1 is a top plan view of the building block of the present invention; and,

FIG. 2 is a perspective view thereof. 

The ornamental design for a building block, as shown and described. 